The Jäger movement were volunteers from Finland trained in Germany as Jägers (elite light infantry)
during World War I (1914-1918). Supported by Germany to enable a Finnish sovereign
state, it was one of many means by which Germany intended to weaken
Russia and to cause Russia's
loss of western provinces and dependencies.

The recruitment of the Jäger volunteers from the Grand Duchy of
Finland were clandestine,
and was dominated by Germany-influenced circles, such as university
students and the upper middle class. The recruitment was however in no
way exclusive.

The recruits were transported across Finland's western border via
Sweden to Germany, where the
volunteers were formed into the Royal Prussian 27th Jäger Battalion.
The Jäger Battalion fought in the ranks of the German Army from 1916 in the
battles on the northern flank of the eastern front.

The "White", or The White Guards is one translation of the Finnish
term Suojeluskunta (plural: Suojeluskunnat, Finland-Swedish:
Skyddskår), which has received many different approximations in
English, including Security Guard, Civil Guard, Civic Guards, National
Guard, White Militia, Defence Corps, Protection Guard, Protection
Corps and Protection Militia. These White Guards constituted the bulk
of the victorious White Army during the Finnish Civil War (1918), and
parts of it formed the main forces of the Lapua Movement's failed coup
d'état, the Mäntsälä Rebellion (1932).
Source: http://en.wikipedia.org/wiki/White_Guard_(Finland)